標題: A study of bispectra in relation to the adequacy of wave spectral model
作者: Kuo, YY
Chien, CC
Yim, JY
土木工程學系
Department of Civil Engineering
關鍵字: bispectrum;nonlinearity;spectral form;wave spectral model
公開日期: 1-Jan-1997
摘要: In this paper, the characteristics of laboratory wind waves under various wind speeds and water depths are studied. It is found that either the real or the imaginary part of the bispectrum can be related to the asymmetry of the wave profile, and the bicoherence is related to the ratio of nonlinear to linear wave component. Occasionally, these two categories of nonlinear index lead to opposite inferences, because each of them has its own significance and functions. The applicability of linear wave spectral model in ocean waves becomes questionable only when strong nonlinearity is indicated by both of these two indexes, The linear spectral representation of wave fields does not necessarily become inadequate as water depth decreases, and its appropriateness can be examined through the characteristics of the bispectrum.
URI: http://hdl.handle.net/11536/149663
ISSN: 0890-5487
期刊: CHINA OCEAN ENGINEERING
Volume: 11
起始頁: 171
結束頁: 186
Appears in Collections:Articles